Ok so its working smoothly for you...interesting.
Can you please tell me your settings for that emulator, what version it is, if you made an injects or use installed stand alone emulator and what region your roms are?
'Cause for me it's not really a smooth experience, which means something is not right, if it works smoothly on your Old 3DS...
Also are you sure you're not using NEW 3DS? Cause that thing has better CPU than old 3DS...
Yes its an original 3ds it was brought on the very first day the 3ds went on sale.
Latest version of pico is being used. Roms are a mixture of Pal and USA
Settings
Screen Stretch Fullscreen
Font Tempesta
Hide text in bottom screen is ticked
Auto save state is unticked
Frameskip enable max 1 frame
Region default
Framerate default based on game
Low pass filter ticked
Apply volume on all games unticked
Volume amplification middle.
Games tried in emulator
Gauntlet
James Pond
James Pond 2
James Pond 3
Paperboy
Speed Ball 2
Street Fighter 2 Champ Edition prototype
Xeno Crisis
Games tried from Channel.
Sonic 1
Sonic 2
Sonic 3
Sonic and Knuckles
Sonic and Knuckles with Sonic 1
Sonic and Knuckles with Sonic 2
Sonic and Knuckles with Sonic 3
Sonic 3d Blast
Phantasy Star
Phantasy Star 2
Phantasy Star 3
Phantasy Star 4
Pier Solar And The Great Architecs
Castlevania Bloodlines
Wonder Boy In Monster World
Monster World IV
Desert Strike
Jungle Strike
Urban Strike
Toy Story
Comix Zone
Mega Bomberman
Ghouls And Ghosts
Every one of them runs perfectly